Electromagnetic Induction Test

Result

Electromagnetic Induction Test - 58

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

The north pole of a long horizontal bar magnet is being brought closer to a vertical conducting plane along the perpendicular direction. The direction of the inducedcurrent in the conducting plane will be

A
Horizontal

B
Vertical

C
Clockwise

D
Anticlockwise
Question 2
4 / -1

The magnetic field in a coil of 100 turns and 40 square cm area is increased from 1 tesla to 6 tesla in 2 second. The magnetic field is perpendicular to the coil. The e.m.f. generated in it is

A
10⁴ V

B
1.2 V

C
1.0 V

D
10^–2 V

Solution
Question 3
4 / -1

A wire of length 50 cm moves with a velocity of 300 m/min, perpendicular to a magnetic field. If the e.m.f. induced in the wire is 2 V, the magnitude of thefield in tesla is

A
2

B
5

C
0.8

D
2.5

Solution
Question 4
4 / -1

Lenz\'s law gives

A
The magnitude of the induced e.m.f

B
The direction of the induced current

C
Both the magnitude and direction of the induced current

D
The magnitude of the induced current
Question 5
4 / -1

A metallic ring connected to a rod oscillates freely like a pendulum. If now a magnetic field is applied in horizontal direction, so that the pendulum now swings through the field, the pendulum will

A
Keep oscillating with the old time period

B
Keep oscillating with a smaller time period

C
Keep oscillating with a larger time period

D
Come to rest very soon
Question 6
4 / -1

In a circuit with a coil of resistance 2 ohms, the magnetic flux changes from 2.0 Wb to 10.0 Wb in 0.2 second. The charge that flows in the coil during thistime is

A
5.0 coulomb

B
4.0 coulomb

C
1.0 coulomb

D
0.8 coulomb

Solution
Question 7
4 / -1

The direction of induced current is such that it opposes the very cause that has produced it. This is the law of

A
Lenz

B
Faraday

C
Kirchhoff

D
Fleming
Question 8
4 / -1

A solenoid is 1.5 m long and its inner diameter is 4.0 cm. It has three layers of windings of 1000 turns each and carries a current of 2.0 amperes. The magnetic flux for a cross-section of the solenoid is nearly

A
2.5 × 10^–7 weber

B
6.31 × 10^–6 weber

C
5.2 × 10^–5 weber

D
4.1 × 10^–5 weber

Solution
Question 9
4 / -1

A coil of 40 Ω resistance has 100 turns and radius 6 mm is connected to ammeter of resistance of 160 ohms. Coil is placed perpendicular to the magnetic field. When coil is taken out of the field, 32 μC charge flows through it. The intensity of magnetic field will be

A
6.55 T

B
5.66 T

C
0.655 T

D
0.566 T

Solution
Question 10
4 / -1

A magnetic field of 2 × 10^–2 T acts at right angles to acoil of area 100 cm² with 50 turns. The average e.m.f. induced in the coil is 0.1 V, when it is removed from thefield in time t. The value oft is

A
0.1 sec

B
0.01 sec

C
1 sec

D
20 sec

Solution